摘要
针对液膜区存在复杂反应的浆料吸收体系, 通过气体吸收对分散相颗粒溶解增强作用的研究, 建立了反应浆料增强气体吸收的三区域模型. 采用搅拌槽间歇吸收实验测定了不同搅拌强度和Mg(OH)2 浆料固含率时SO2 吸收速率增强. 研究发现, 颗粒粒径、浆料浓度、“惰性区”厚度以及待吸收气体分压等参数是影响吸收增强作用的主要参数. 考虑气液近界面“惰性区”和浆料表观黏度影响后的三区域模型结果与实验结果具有良好的一致性.
The three-zone enhancement model, after investigating the enhancement of gas absorption on solid dissolution, was developed for the absorption systems with complex reactions between absorbed gas and dissolved particles existing in the liquid film zone. Enhancement of absorption rate was measured at different solid hold-up and stirring intensity in a batch stirred vessel for the SO2-Mg(OH)2 system. It was found that particle size, slurry hold-up, 'inert zone' thickness, and partial pressure of transported gas showed major influences on the absorption enhancement. The model results with the consideration of 'inert zone' near gas-liquid interface and corrected by apparent viscosity agreed with experimental data well.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第4期579-586,共8页
CIESC Journal
基金
国家自然科学基金重点项目 (20136010)~~
关键词
反应性浆料
三区域模型
颗粒溶解
气液传质
增强因子
Desulfurization
Dissolution
Gas absorption
Mass transfer
Mathematical models
Partial pressure
Particle size analysis
Phase interfaces
Two phase flow
